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1597 lines
40 KiB
1597 lines
40 KiB
#include "ctlspriv.h"
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//
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// Heapsort is a bit slower, but it doesn't use any stack or memory...
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// Mergesort takes a bit of memory (O(n)) and stack (O(log(n)), but very fast...
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//
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#define MERGESORT
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// #define USEHEAPSORT
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#ifdef DEBUG
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#define DSA_MAGIC ('S' | ('A' << 8))
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#define IsDSA(pdsa) ((pdsa) && (pdsa)->magic == DSA_MAGIC)
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#define DPA_MAGIC ('P' | ('A' << 8))
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#define IsDPA(pdpa) ((pdpa) && (pdpa)->magic == DPA_MAGIC)
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#else
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#define IsDSA(pdsa)
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#define IsDPA(pdsa)
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#endif
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typedef struct {
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void** pp;
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PFNDPACOMPARE pfnCmp;
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LPARAM lParam;
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int cp;
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#ifdef MERGESORT
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void** ppT;
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#endif
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} SORTPARAMS;
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BOOL DPA_QuickSort(SORTPARAMS* psp);
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BOOL DPA_QuickSort2(int i, int j, SORTPARAMS* psp);
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BOOL DPA_HeapSort(SORTPARAMS* psp);
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void DPA_HeapSortPushDown(int first, int last, SORTPARAMS* psp);
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BOOL DPA_MergeSort(SORTPARAMS* psp);
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void DPA_MergeSort2(SORTPARAMS* psp, int iFirst, int cItems);
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//========== Dynamic structure array ====================================
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// Dynamic structure array
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typedef struct _DSA
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{
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// NOTE: The following field MUST be defined at the beginning of the
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// structure in order for GetItemCount() to work.
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int cItem; // # of elements in dsa
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void* aItem; // memory for elements
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int cItemAlloc; // # items which fit in aItem
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int cbItem; // size of each item
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int cItemGrow; // # items to grow cItemAlloc by
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#ifdef DEBUG
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UINT magic;
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#endif
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} DSA;
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#define DSA_PITEM(pdsa, index) ((void*)(((BYTE*)(pdsa)->aItem) + ((index) * (pdsa)->cbItem)))
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#ifdef DEBUG
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#define BF_ONDAVALIDATE 0x00001000
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void DABreakFn(void)
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{
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if (IsFlagSet(g_dwBreakFlags, BF_ONDAVALIDATE))
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ASSERT(0);
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}
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#define DABreak() DABreakFn()
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#else
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#define DABreak()
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#endif
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HDSA WINAPI DSA_Create(int cbItem, int cItemGrow)
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{
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HDSA pdsa = Alloc(sizeof(DSA));
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ASSERT(cbItem);
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if (pdsa)
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{
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ASSERT(pdsa->cItem == 0);
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ASSERT(pdsa->cItemAlloc == 0);
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pdsa->cbItem = cbItem;
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pdsa->cItemGrow = (cItemGrow == 0 ? 1 : cItemGrow);
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ASSERT(pdsa->aItem == NULL);
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#ifdef DEBUG
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pdsa->magic = DSA_MAGIC;
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#endif
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}
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return pdsa;
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}
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BOOL WINAPI DSA_Destroy(HDSA pdsa)
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{
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if (pdsa == NULL)
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{
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// allow NULL for low memory cases
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return TRUE;
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}
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// Components rely on not having to check for NULL
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ASSERT(IsDSA(pdsa));
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#ifdef DEBUG
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pdsa->cItem = 0;
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pdsa->cItemAlloc = 0;
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pdsa->cbItem = 0;
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pdsa->magic = 0;
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#endif
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if (pdsa->aItem && !Free(pdsa->aItem))
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{
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return FALSE;
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}
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return Free(pdsa);
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}
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void WINAPI DSA_EnumCallback(HDSA pdsa, PFNDSAENUMCALLBACK pfnCB, void *pData)
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{
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int i;
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if (!pdsa)
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return;
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ASSERT(IsDSA(pdsa));
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for (i = 0; i < pdsa->cItem; i++) {
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if (!pfnCB(DSA_GetItemPtr(pdsa, i), pData))
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break;
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}
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}
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void WINAPI DSA_DestroyCallback(HDSA pdsa, PFNDSAENUMCALLBACK pfnCB, void *pData)
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{
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DSA_EnumCallback(pdsa, pfnCB, pData);
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DSA_Destroy(pdsa);
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}
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BOOL WINAPI DSA_GetItem(HDSA pdsa, int index, void* pitem)
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{
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ASSERT(IsDSA(pdsa));
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ASSERT(pitem);
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if (index < 0 || index >= pdsa->cItem)
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{
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#ifdef DEBUG
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// Don't assert if index == pdsa->cItems as some clients simply want to walk the list and no need to call getcount...
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if (index != pdsa->cItem)
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{
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DebugMsg(DM_ERROR, TEXT("DSA: GetItem: Invalid index: %d"), index);
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DABreak();
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}
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#endif
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return FALSE;
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}
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CopyMemory(pitem, DSA_PITEM(pdsa, index), pdsa->cbItem);
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return TRUE;
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}
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void* WINAPI DSA_GetItemPtr(HDSA pdsa, int index)
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{
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ASSERT(IsDSA(pdsa));
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if (index < 0 || index >= pdsa->cItem)
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{
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#ifdef DEBUG
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// Don't assert if index == pdsa->cItems as some clients simply want to walk the list and no need to call getcount...
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if (index != pdsa->cItem)
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{
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DebugMsg(DM_ERROR, TEXT("DSA: GetItemPtr: Invalid index: %d"), index);
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// DABreak(); // caller knows
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}
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#endif
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return NULL;
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}
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return DSA_PITEM(pdsa, index);
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}
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BOOL DSA_ForceGrow(HDSA pdsa, int iNumberToAdd)
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{
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ASSERT(IsDSA(pdsa));
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if (!pdsa)
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return FALSE;
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if (pdsa->cItem + iNumberToAdd > pdsa->cItemAlloc)
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{
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int cItemAlloc = (((pdsa->cItemAlloc + iNumberToAdd) + pdsa->cItemGrow - 1) / pdsa->cItemGrow) * pdsa->cItemGrow;
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void* aItemNew = ReAlloc(pdsa->aItem, cItemAlloc * pdsa->cbItem);
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if (!aItemNew)
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{
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return FALSE;
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}
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pdsa->aItem = aItemNew;
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pdsa->cItemAlloc = cItemAlloc;
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}
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return TRUE;
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}
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BOOL WINAPI DSA_SetItem(HDSA pdsa, int index, void* pitem)
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{
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ASSERT(pitem);
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ASSERT(IsDSA(pdsa));
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if (index < 0)
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{
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DebugMsg(DM_ERROR, TEXT("DSA: SetItem: Invalid index: %d"), index);
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DABreak();
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return FALSE;
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}
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if (index >= pdsa->cItem)
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{
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if (index + 1 > pdsa->cItemAlloc)
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{
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int cItemAlloc = (((index + 1) + pdsa->cItemGrow - 1) / pdsa->cItemGrow) * pdsa->cItemGrow;
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void* aItemNew = ReAlloc(pdsa->aItem, cItemAlloc * pdsa->cbItem);
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if (!aItemNew)
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{
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return FALSE;
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}
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pdsa->aItem = aItemNew;
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pdsa->cItemAlloc = cItemAlloc;
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}
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pdsa->cItem = index + 1;
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}
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CopyMemory(DSA_PITEM(pdsa, index), pitem, pdsa->cbItem);
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return TRUE;
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}
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int WINAPI DSA_InsertItem(HDSA pdsa, int index, void* pitem)
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{
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ASSERT(pitem);
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ASSERT(IsDSA(pdsa));
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if (index < 0)
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{
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DebugMsg(DM_ERROR, TEXT("DSA: InsertItem: Invalid index: %d"), index);
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DABreak();
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return -1;
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}
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if (index > pdsa->cItem)
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index = pdsa->cItem;
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if (pdsa->cItem + 1 > pdsa->cItemAlloc)
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{
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void* aItemNew = ReAlloc(pdsa->aItem, (pdsa->cItemAlloc + pdsa->cItemGrow) * pdsa->cbItem);
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if (!aItemNew)
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{
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return -1;
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}
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pdsa->aItem = aItemNew;
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pdsa->cItemAlloc += pdsa->cItemGrow;
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}
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if (index < pdsa->cItem)
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{
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MoveMemory(DSA_PITEM(pdsa, index + 1),
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DSA_PITEM(pdsa, index),
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(pdsa->cItem - index) * pdsa->cbItem);
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}
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pdsa->cItem++;
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MoveMemory(DSA_PITEM(pdsa, index), pitem, pdsa->cbItem);
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return index;
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}
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BOOL WINAPI DSA_DeleteItem(HDSA pdsa, int index)
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{
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ASSERT(IsDSA(pdsa));
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if (index < 0 || index >= pdsa->cItem)
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{
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DebugMsg(DM_ERROR, TEXT("DSA: DeleteItem: Invalid index: %d"), index);
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DABreak();
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return FALSE;
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}
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if (index < pdsa->cItem - 1)
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{
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MoveMemory(DSA_PITEM(pdsa, index),
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DSA_PITEM(pdsa, index + 1),
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(pdsa->cItem - (index + 1)) * pdsa->cbItem);
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}
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pdsa->cItem--;
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if (pdsa->cItemAlloc - pdsa->cItem > pdsa->cItemGrow)
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{
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void* aItemNew = ReAlloc(pdsa->aItem, (pdsa->cItemAlloc - pdsa->cItemGrow) * pdsa->cbItem);
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if (aItemNew)
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{
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pdsa->aItem = aItemNew;
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}
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else
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{
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// If the shrink fails, then just continue with the old (slightly
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// too big) allocation. Go ahead and let cItemAlloc decrease
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// so we don't keep trying to realloc smaller
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}
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pdsa->cItemAlloc -= pdsa->cItemGrow;
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}
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return TRUE;
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}
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BOOL WINAPI DSA_DeleteAllItems(HDSA pdsa)
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{
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ASSERT(IsDSA(pdsa));
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if (pdsa->aItem && !Free(pdsa->aItem))
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{
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return FALSE;
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}
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pdsa->aItem = NULL;
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pdsa->cItem = pdsa->cItemAlloc = 0;
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return TRUE;
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}
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//================== Dynamic pointer array implementation ===========
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typedef struct _DPA
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{
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// NOTE: The following two fields MUST be defined in this order, at
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// the beginning of the structure in order for the macro APIs to work.
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int cp;
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void** pp;
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HANDLE hheap; // Heap to allocate from if NULL use shared
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int cpAlloc;
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int cpGrow;
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#ifdef DEBUG
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UINT magic;
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#endif
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} DPA;
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HDPA WINAPI DPA_Create(int cpGrow)
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{
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return DPA_CreateEx(cpGrow, NULL);
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}
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// Should nuke the standard DPA above...
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HDPA WINAPI DPA_CreateEx(int cpGrow, HANDLE hheap)
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{
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HDPA pdpa;
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if (hheap == NULL)
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{
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hheap = GetProcessHeap();
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pdpa = ControlAlloc(hheap, sizeof(DPA));
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}
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else
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pdpa = ControlAlloc(hheap, sizeof(DPA));
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if (pdpa)
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{
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ASSERT(pdpa->cp == 0);
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ASSERT(pdpa->cpAlloc == 0);
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pdpa->cpGrow = (cpGrow < 8 ? 8 : cpGrow);
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ASSERT(pdpa->pp == NULL);
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pdpa->hheap = hheap;
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#ifdef DEBUG
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pdpa->magic = DPA_MAGIC;
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#endif
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}
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return pdpa;
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}
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BOOL WINAPI DPA_Destroy(HDPA pdpa)
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{
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if (pdpa == NULL) // allow NULL for low memory cases, still assert
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return TRUE;
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ASSERT(IsDPA(pdpa));
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ASSERT(pdpa->hheap);
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#ifdef DEBUG
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pdpa->cp = 0;
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pdpa->cpAlloc = 0;
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pdpa->magic = 0;
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#endif
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if (pdpa->pp && !ControlFree(pdpa->hheap, pdpa->pp))
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return FALSE;
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return ControlFree(pdpa->hheap, pdpa);
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}
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HDPA WINAPI DPA_Clone(HDPA pdpa, HDPA pdpaNew)
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{
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BOOL fAlloc = FALSE;
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if (!pdpaNew)
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{
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pdpaNew = DPA_CreateEx(pdpa->cpGrow, pdpa->hheap);
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if (!pdpaNew)
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{
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return NULL;
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}
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fAlloc = TRUE;
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}
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if (!DPA_Grow(pdpaNew, pdpa->cpAlloc))
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{
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if (!fAlloc)
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{
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DPA_Destroy(pdpaNew);
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}
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return NULL;
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}
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pdpaNew->cp = pdpa->cp;
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CopyMemory(pdpaNew->pp, pdpa->pp, pdpa->cp * sizeof(void*));
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return pdpaNew;
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}
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void* WINAPI DPA_GetPtr(HDPA pdpa, INT_PTR index)
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{
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ASSERT(IsDPA(pdpa));
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if (!pdpa || index < 0 || index >= pdpa->cp)
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return NULL;
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return pdpa->pp[index];
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}
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int WINAPI DPA_GetPtrIndex(HDPA pdpa, void* p)
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{
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void** pp;
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void** ppMax;
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ASSERT(IsDPA(pdpa));
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if (pdpa && pdpa->pp)
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{
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pp = pdpa->pp;
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ppMax = pp + pdpa->cp;
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for ( ; pp < ppMax; pp++)
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{
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if (*pp == p)
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return (int) (pp - pdpa->pp);
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}
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}
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return -1;
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}
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BOOL WINAPI DPA_Grow(HDPA pdpa, int cpAlloc)
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{
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ASSERT(IsDPA(pdpa));
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if (!pdpa)
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return FALSE;
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if (cpAlloc > pdpa->cpAlloc)
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{
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void** ppNew;
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cpAlloc = ((cpAlloc + pdpa->cpGrow - 1) / pdpa->cpGrow) * pdpa->cpGrow;
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if (pdpa->pp)
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ppNew = (void**)ControlReAlloc(pdpa->hheap, pdpa->pp, cpAlloc * sizeof(void*));
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else
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ppNew = (void**)ControlAlloc(pdpa->hheap, cpAlloc * sizeof(void*));
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if (!ppNew)
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return FALSE;
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pdpa->pp = ppNew;
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pdpa->cpAlloc = cpAlloc;
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//
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// Grow more agressively as we get bigger, up to a maximum of
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// 512 at a time. Note, we'll only hit our outer bound growth
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// at a time limit once we've already got that many items in the
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// DPA anyway...
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//
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if (pdpa->cpGrow < 256)
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{
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pdpa->cpGrow = pdpa->cpGrow << 1;
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}
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}
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return TRUE;
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}
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BOOL WINAPI DPA_SetPtr(HDPA pdpa, int index, void* p)
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{
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ASSERT(IsDPA(pdpa));
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if (!pdpa)
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return FALSE;
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if (index < 0)
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{
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DebugMsg(DM_ERROR, TEXT("DPA: SetPtr: Invalid index: %d"), index);
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DABreak();
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return FALSE;
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}
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if (index >= pdpa->cp)
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{
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if (!DPA_Grow(pdpa, index + 1))
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return FALSE;
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// If we grew by more than one, must zero-init all the stuff in the middle
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ZeroMemory(pdpa->pp + pdpa->cp, sizeof(void *) * (index - pdpa->cp));
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pdpa->cp = index + 1;
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}
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pdpa->pp[index] = p;
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return TRUE;
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}
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int WINAPI DPA_InsertPtr(HDPA pdpa, int index, void* p)
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{
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ASSERT(IsDPA(pdpa));
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if (!pdpa)
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return -1;
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if (index < 0)
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{
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DebugMsg(DM_ERROR, TEXT("DPA: InsertPtr: Invalid index: %d"), index);
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DABreak();
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return -1;
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}
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if (index > pdpa->cp)
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index = pdpa->cp;
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// Make sure we have room for one more item
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//
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if (pdpa->cp + 1 > pdpa->cpAlloc)
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{
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if (!DPA_Grow(pdpa, pdpa->cp + 1))
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return -1;
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}
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// If we are inserting, we need to slide everybody up
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//
|
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if (index < pdpa->cp)
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{
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MoveMemory(&pdpa->pp[index + 1],
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&pdpa->pp[index],
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(pdpa->cp - index) * sizeof(void*));
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}
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pdpa->pp[index] = p;
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pdpa->cp++;
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return index;
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}
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|
|
void* WINAPI DPA_DeletePtr(HDPA pdpa, int index)
|
|
{
|
|
void* p;
|
|
|
|
ASSERT(IsDPA(pdpa));
|
|
|
|
if (!pdpa)
|
|
return FALSE;
|
|
|
|
if (index < 0 || index >= pdpa->cp)
|
|
{
|
|
DebugMsg(DM_ERROR, TEXT("DPA: DeltePtr: Invalid index: %d"), index);
|
|
DABreak();
|
|
return NULL;
|
|
}
|
|
|
|
p = pdpa->pp[index];
|
|
|
|
if (index < pdpa->cp - 1)
|
|
{
|
|
MoveMemory(&pdpa->pp[index],
|
|
&pdpa->pp[index + 1],
|
|
(pdpa->cp - (index + 1)) * sizeof(void*));
|
|
}
|
|
pdpa->cp--;
|
|
|
|
if (pdpa->cpAlloc - pdpa->cp > pdpa->cpGrow)
|
|
{
|
|
void** ppNew;
|
|
ppNew = ControlReAlloc(pdpa->hheap, pdpa->pp, (pdpa->cpAlloc - pdpa->cpGrow) * sizeof(void*));
|
|
|
|
if (ppNew)
|
|
pdpa->pp = ppNew;
|
|
else
|
|
{
|
|
// If the shrink fails, then just continue with the old (slightly
|
|
// too big) allocation. Go ahead and let cpAlloc decrease
|
|
// so we don't keep trying to realloc smaller
|
|
}
|
|
pdpa->cpAlloc -= pdpa->cpGrow;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
BOOL WINAPI DPA_DeleteAllPtrs(HDPA pdpa)
|
|
{
|
|
if (!pdpa)
|
|
return FALSE;
|
|
|
|
ASSERT(IsDPA(pdpa));
|
|
|
|
if (pdpa->pp && !ControlFree(pdpa->hheap, pdpa->pp))
|
|
return FALSE;
|
|
pdpa->pp = NULL;
|
|
pdpa->cp = pdpa->cpAlloc = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
void WINAPI DPA_EnumCallback(HDPA pdpa, PFNDPAENUMCALLBACK pfnCB, void *pData)
|
|
{
|
|
int i;
|
|
|
|
if (!pdpa)
|
|
return;
|
|
|
|
ASSERT(IsDPA(pdpa));
|
|
|
|
for (i = 0; i < pdpa->cp; i++) {
|
|
if (!pfnCB(DPA_FastGetPtr(pdpa, i), pData))
|
|
break;
|
|
}
|
|
}
|
|
|
|
void WINAPI DPA_DestroyCallback(HDPA pdpa, PFNDPAENUMCALLBACK pfnCB, void *pData)
|
|
{
|
|
DPA_EnumCallback(pdpa, pfnCB, pData);
|
|
DPA_Destroy(pdpa);
|
|
}
|
|
|
|
|
|
typedef struct _DPASTREAMHEADER
|
|
{
|
|
DWORD cbSize; // Size of entire stream
|
|
DWORD dwVersion; // For versioning
|
|
int celem;
|
|
} DPASTREAMHEADER;
|
|
|
|
#define DPASTREAM_VERSION 1
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Saves the DPA to a stream by writing out a header,
|
|
and then calling the given callback to write each
|
|
element.
|
|
|
|
The callback can end the write early by returning
|
|
something other than S_OK. Returning an error will
|
|
cancel the entire write. Returning S_FALSE will
|
|
stop the write.
|
|
|
|
Returns: S_OK or S_FALSE for success.
|
|
S_FALSE only if callback stops early
|
|
errors
|
|
*/
|
|
HRESULT
|
|
WINAPI
|
|
DPA_SaveStream(
|
|
IN HDPA pdpa,
|
|
IN PFNDPASTREAM pfn,
|
|
IN IStream * pstm,
|
|
IN void * pvInstData)
|
|
{
|
|
HRESULT hres = E_INVALIDARG;
|
|
|
|
if (IS_VALID_HANDLE(pdpa, DPA) &&
|
|
IS_VALID_CODE_PTR(pstm, IStream *) &&
|
|
IS_VALID_CODE_PTR(pfn, PFNDPASTREAM))
|
|
{
|
|
DPASTREAMHEADER header;
|
|
LARGE_INTEGER dlibMove = { 0 };
|
|
ULARGE_INTEGER ulPosBegin;
|
|
|
|
// Get the current seek position, so we can update the header
|
|
// once we know how much we've written
|
|
hres = pstm->lpVtbl->Seek(pstm, dlibMove, STREAM_SEEK_CUR, &ulPosBegin);
|
|
if (SUCCEEDED(hres))
|
|
{
|
|
// Write the header (we will update some of this once we're
|
|
// finished)
|
|
header.cbSize = 0;
|
|
header.dwVersion = DPASTREAM_VERSION;
|
|
header.celem = 0;
|
|
|
|
// First write out the header
|
|
hres = pstm->lpVtbl->Write(pstm, &header, sizeof(header), NULL);
|
|
|
|
if (SUCCEEDED(hres))
|
|
{
|
|
DPASTREAMINFO info;
|
|
int cel = DPA_GetPtrCount(pdpa);
|
|
void **ppv = DPA_GetPtrPtr(pdpa);
|
|
|
|
// This keeps the count of what is actually written
|
|
info.iPos = 0;
|
|
|
|
// Write each element
|
|
for (; 0 < cel; cel--, ppv++)
|
|
{
|
|
info.pvItem = *ppv;
|
|
hres = pfn(&info, pstm, pvInstData);
|
|
|
|
// Returning S_FALSE from callback means it didn't
|
|
// write anything for this element, so don't increment
|
|
// the iPos (which refers to the count written).
|
|
|
|
if (S_OK == hres)
|
|
info.iPos++;
|
|
else if (FAILED(hres))
|
|
{
|
|
hres = S_FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (FAILED(hres))
|
|
{
|
|
// Reposition pointer to beginning
|
|
dlibMove.LowPart = ulPosBegin.LowPart;
|
|
dlibMove.HighPart = ulPosBegin.HighPart;
|
|
pstm->lpVtbl->Seek(pstm, dlibMove, STREAM_SEEK_SET, NULL);
|
|
}
|
|
else
|
|
{
|
|
ULARGE_INTEGER ulPosEnd;
|
|
|
|
// Calculate how much was written
|
|
hres = pstm->lpVtbl->Seek(pstm, dlibMove, STREAM_SEEK_CUR,
|
|
&ulPosEnd);
|
|
if (SUCCEEDED(hres))
|
|
{
|
|
// We only save the low part
|
|
ASSERT(ulPosEnd.HighPart == ulPosBegin.HighPart);
|
|
|
|
// Update the header
|
|
header.celem = info.iPos;
|
|
header.cbSize = ulPosEnd.LowPart - ulPosBegin.LowPart;
|
|
|
|
dlibMove.LowPart = ulPosBegin.LowPart;
|
|
dlibMove.HighPart = ulPosBegin.HighPart;
|
|
pstm->lpVtbl->Seek(pstm, dlibMove, STREAM_SEEK_SET, NULL);
|
|
pstm->lpVtbl->Write(pstm, &header, sizeof(header), NULL);
|
|
|
|
// Reposition pointer
|
|
dlibMove.LowPart = ulPosEnd.LowPart;
|
|
dlibMove.HighPart = ulPosEnd.HighPart;
|
|
pstm->lpVtbl->Seek(pstm, dlibMove, STREAM_SEEK_SET, NULL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return hres;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Loads the DPA from a stream by calling the given callback
|
|
to read each element.
|
|
|
|
The callback can end the read early by returning
|
|
something other than S_OK.
|
|
|
|
Returns: S_OK on success
|
|
S_FALSE if the callback aborted early or the stream ended
|
|
abruptly. DPA is partially filled.
|
|
error on anything else
|
|
*/
|
|
HRESULT
|
|
WINAPI
|
|
DPA_LoadStream(
|
|
OUT HDPA * ppdpa,
|
|
IN PFNDPASTREAM pfn,
|
|
IN IStream * pstm,
|
|
IN void * pvInstData)
|
|
{
|
|
HRESULT hres = E_INVALIDARG;
|
|
|
|
if (IS_VALID_WRITE_PTR(ppdpa, HDPA) &&
|
|
IS_VALID_CODE_PTR(pstm, IStream *) &&
|
|
IS_VALID_CODE_PTR(pfn, PFNDPASTREAM))
|
|
{
|
|
DPASTREAMHEADER header;
|
|
LARGE_INTEGER dlibMove = { 0 };
|
|
ULARGE_INTEGER ulPosBegin;
|
|
ULONG cbRead;
|
|
|
|
*ppdpa = NULL;
|
|
|
|
// Get the current seek position so we can position pointer
|
|
// correctly upon error.
|
|
hres = pstm->lpVtbl->Seek(pstm, dlibMove, STREAM_SEEK_CUR, &ulPosBegin);
|
|
if (SUCCEEDED(hres))
|
|
{
|
|
// Read the header
|
|
hres = pstm->lpVtbl->Read(pstm, &header, sizeof(header), &cbRead);
|
|
if (SUCCEEDED(hres))
|
|
{
|
|
if (sizeof(header) > cbRead ||
|
|
sizeof(header) > header.cbSize ||
|
|
DPASTREAM_VERSION != header.dwVersion)
|
|
{
|
|
hres = E_FAIL;
|
|
}
|
|
else
|
|
{
|
|
// Create the list
|
|
HDPA pdpa = DPA_Create(header.celem);
|
|
if ( !pdpa || !DPA_Grow(pdpa, header.celem))
|
|
hres = E_OUTOFMEMORY;
|
|
else
|
|
{
|
|
// Read each element
|
|
DPASTREAMINFO info;
|
|
void **ppv = DPA_GetPtrPtr(pdpa);
|
|
|
|
for (info.iPos = 0; info.iPos < header.celem; )
|
|
{
|
|
info.pvItem = NULL;
|
|
hres = pfn(&info, pstm, pvInstData);
|
|
|
|
// Returning S_FALSE from the callback means
|
|
// it skipped this stream element.
|
|
// Don't increment iPos (which refers to the
|
|
// count read).
|
|
if (S_OK == hres)
|
|
{
|
|
*ppv = info.pvItem;
|
|
|
|
info.iPos++;
|
|
ppv++;
|
|
}
|
|
else if (FAILED(hres))
|
|
{
|
|
hres = S_FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
pdpa->cp = info.iPos;
|
|
*ppdpa = pdpa;
|
|
}
|
|
}
|
|
|
|
// Reposition pointer if we failed
|
|
if (S_OK != hres)
|
|
{
|
|
if (S_FALSE == hres)
|
|
{
|
|
// Position pointer to the end
|
|
dlibMove.LowPart = ulPosBegin.LowPart + header.cbSize;
|
|
}
|
|
else
|
|
{
|
|
// Position pointer to beginning
|
|
dlibMove.LowPart = ulPosBegin.LowPart;
|
|
}
|
|
dlibMove.HighPart = ulPosBegin.HighPart;
|
|
pstm->lpVtbl->Seek(pstm, dlibMove, STREAM_SEEK_SET, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
ASSERT(SUCCEEDED(hres) && *ppdpa ||
|
|
FAILED(hres) && NULL == *ppdpa);
|
|
}
|
|
|
|
return hres;
|
|
}
|
|
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Merge two DPAs. This takes two arrays and merges the
|
|
source array into the destination.
|
|
|
|
Merge options:
|
|
|
|
DPAM_SORTED The arrays are already sorted; don't sort
|
|
DPAM_UNION The resulting array is the union of all elements
|
|
in both arrays.
|
|
DPAM_INTERSECT Only elements in the source array that intersect
|
|
with the dest array are merged.
|
|
DPAM_NORMAL Like DPAM_INTERSECT except the dest array
|
|
also maintains its original, additional elements.
|
|
|
|
|
|
Returns: S_OK for success.
|
|
errors if merge fails
|
|
|
|
Cond: --
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
DPA_Merge(
|
|
IN HDPA pdpaDest,
|
|
IN HDPA pdpaSrc,
|
|
IN DWORD dwFlags,
|
|
IN PFNDPACOMPARE pfnCompare,
|
|
IN PFNDPAMERGE pfnMerge,
|
|
IN LPARAM lParam)
|
|
{
|
|
BOOL bRet = FALSE;
|
|
|
|
if (IS_VALID_HANDLE(pdpaSrc, DPA) &&
|
|
IS_VALID_HANDLE(pdpaDest, DPA) &&
|
|
IS_VALID_CODE_PTR(pfnCompare, PFNDPACOMPARE) &&
|
|
IS_VALID_CODE_PTR(pfnMerge, PFNDPAMERGE))
|
|
{
|
|
int iSrc;
|
|
int iDest;
|
|
int nCmp;
|
|
void **ppvSrc;
|
|
void **ppvDest;
|
|
|
|
bRet = TRUE;
|
|
|
|
// Are the arrays already sorted?
|
|
if ( !(dwFlags & DPAM_SORTED) )
|
|
{
|
|
// No; sort them
|
|
DPA_Sort(pdpaSrc, pfnCompare, lParam);
|
|
DPA_Sort(pdpaDest, pfnCompare, lParam);
|
|
}
|
|
|
|
// This merges in-place. The size of the resulting DPA
|
|
// depends on the options:
|
|
//
|
|
// DPAM_NORMAL Same size as the dest DPA before
|
|
// the merge.
|
|
//
|
|
// DPAM_UNION Min size is the larger of the two.
|
|
// Max size is the sum of the two.
|
|
//
|
|
// DPAM_INTERSECT Min size is zero.
|
|
// Max size is the smaller of the two.
|
|
//
|
|
// We iterate backwards to minimize the amount of moves we
|
|
// incur by calling DPA_DeletePtr.
|
|
//
|
|
|
|
iSrc = pdpaSrc->cp - 1;
|
|
iDest = pdpaDest->cp - 1;
|
|
ppvSrc = &DPA_FastGetPtr(pdpaSrc, iSrc);
|
|
ppvDest = &DPA_FastGetPtr(pdpaDest, iDest);
|
|
|
|
while (0 <= iSrc && 0 <= iDest)
|
|
{
|
|
void *pv;
|
|
|
|
nCmp = pfnCompare(*ppvDest, *ppvSrc, lParam);
|
|
|
|
if (0 == nCmp)
|
|
{
|
|
// Elements match; merge them.
|
|
pv = pfnMerge(DPAMM_MERGE, *ppvDest, *ppvSrc, lParam);
|
|
if (NULL == pv)
|
|
{
|
|
bRet = FALSE;
|
|
break;
|
|
}
|
|
*ppvDest = pv;
|
|
|
|
iSrc--;
|
|
ppvSrc--;
|
|
iDest--;
|
|
ppvDest--;
|
|
}
|
|
else if (0 < nCmp)
|
|
{
|
|
// pvSrc < pvDest. The source array doesn't have pvDest.
|
|
if (dwFlags & DPAM_INTERSECT)
|
|
{
|
|
// Delete pvDest
|
|
pfnMerge(DPAMM_DELETE, DPA_DeletePtr(pdpaDest, iDest), NULL, lParam);
|
|
}
|
|
else
|
|
{
|
|
; // Keep it (do nothing)
|
|
}
|
|
|
|
// Move onto the next element in the dest array
|
|
iDest--;
|
|
ppvDest--;
|
|
}
|
|
else
|
|
{
|
|
// pvSrc > pvDest. The dest array doesn't have pvSrc.
|
|
if (dwFlags & DPAM_UNION)
|
|
{
|
|
// Add pvSrc
|
|
pv = pfnMerge(DPAMM_INSERT, *ppvSrc, NULL, lParam);
|
|
if (NULL == pv)
|
|
{
|
|
bRet = FALSE;
|
|
break;
|
|
}
|
|
|
|
DPA_InsertPtr(pdpaDest, iDest+1, pv);
|
|
// DPA_InsertPtr may end up reallocating the pointer array
|
|
// thus making ppvDest invalid
|
|
ppvDest = &DPA_FastGetPtr(pdpaDest, iDest);
|
|
}
|
|
else
|
|
{
|
|
; // Skip it (do nothing)
|
|
}
|
|
|
|
// Move onto the next element in the source array
|
|
iSrc--;
|
|
ppvSrc--;
|
|
}
|
|
}
|
|
// there are some items left in src
|
|
if ((dwFlags & DPAM_UNION) && 0 <= iSrc)
|
|
{
|
|
for (; 0 <= iSrc; iSrc--, ppvSrc--)
|
|
{
|
|
void *pv = pfnMerge(DPAMM_INSERT, *ppvSrc, NULL, lParam);
|
|
if (NULL == pv)
|
|
{
|
|
bRet = FALSE;
|
|
break;
|
|
}
|
|
DPA_InsertPtr(pdpaDest, 0, pv);
|
|
}
|
|
}
|
|
}
|
|
|
|
return bRet;
|
|
}
|
|
|
|
|
|
BOOL WINAPI DPA_Sort(HDPA pdpa, PFNDPACOMPARE pfnCmp, LPARAM lParam)
|
|
{
|
|
SORTPARAMS sp;
|
|
|
|
sp.cp = pdpa->cp;
|
|
sp.pp = pdpa->pp;
|
|
sp.pfnCmp = pfnCmp;
|
|
sp.lParam = lParam;
|
|
|
|
#ifdef USEQUICKSORT
|
|
return DPA_QuickSort(&sp);
|
|
#endif
|
|
#ifdef USEHEAPSORT
|
|
return DPA_HeapSort(&sp);
|
|
#endif
|
|
#ifdef MERGESORT
|
|
return DPA_MergeSort(&sp);
|
|
#endif
|
|
}
|
|
|
|
#ifdef USEQUICKSORT
|
|
|
|
BOOL DPA_QuickSort(SORTPARAMS* psp)
|
|
{
|
|
return DPA_QuickSort2(0, psp->cp - 1, psp);
|
|
}
|
|
|
|
BOOL DPA_QuickSort2(int i, int j, SORTPARAMS* psp)
|
|
{
|
|
void** pp = psp->pp;
|
|
LPARAM lParam = psp->lParam;
|
|
PFNDPACOMPARE pfnCmp = psp->pfnCmp;
|
|
|
|
int iPivot;
|
|
void* pFirst;
|
|
int k;
|
|
int result;
|
|
|
|
iPivot = -1;
|
|
pFirst = pp[i];
|
|
for (k = i + 1; k <= j; k++)
|
|
{
|
|
result = (*pfnCmp)(pp[k], pFirst, lParam);
|
|
|
|
if (result > 0)
|
|
{
|
|
iPivot = k;
|
|
break;
|
|
}
|
|
else if (result < 0)
|
|
{
|
|
iPivot = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (iPivot != -1)
|
|
{
|
|
int l = i;
|
|
int r = j;
|
|
void* pivot = pp[iPivot];
|
|
|
|
do
|
|
{
|
|
void* p;
|
|
|
|
p = pp[l];
|
|
pp[l] = pp[r];
|
|
pp[r] = p;
|
|
|
|
while ((*pfnCmp)(pp[l], pivot, lParam) < 0)
|
|
l++;
|
|
while ((*pfnCmp)(pp[r], pivot, lParam) >= 0)
|
|
r--;
|
|
} while (l <= r);
|
|
|
|
if (l - 1 > i)
|
|
DPA_QuickSort2(i, l - 1, psp);
|
|
if (j > l)
|
|
DPA_QuickSort2(l, j, psp);
|
|
}
|
|
return TRUE;
|
|
}
|
|
#endif // USEQUICKSORT
|
|
|
|
#ifdef USEHEAPSORT
|
|
|
|
void DPA_HeapSortPushDown(int first, int last, SORTPARAMS* psp)
|
|
{
|
|
void** pp = psp->pp;
|
|
LPARAM lParam = psp->lParam;
|
|
PFNDPACOMPARE pfnCmp = psp->pfnCmp;
|
|
int r;
|
|
int r2;
|
|
void* p;
|
|
|
|
r = first;
|
|
while (r <= last / 2)
|
|
{
|
|
int wRTo2R;
|
|
r2 = r * 2;
|
|
|
|
wRTo2R = (*pfnCmp)(pp[r-1], pp[r2-1], lParam);
|
|
|
|
if (r2 == last)
|
|
{
|
|
if (wRTo2R < 0)
|
|
{
|
|
p = pp[r-1]; pp[r-1] = pp[r2-1]; pp[r2-1] = p;
|
|
}
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
int wR2toR21 = (*pfnCmp)(pp[r2-1], pp[r2+1-1], lParam);
|
|
|
|
if (wRTo2R < 0 && wR2toR21 >= 0)
|
|
{
|
|
p = pp[r-1]; pp[r-1] = pp[r2-1]; pp[r2-1] = p;
|
|
r = r2;
|
|
}
|
|
else if ((*pfnCmp)(pp[r-1], pp[r2+1-1], lParam) < 0 && wR2toR21 < 0)
|
|
{
|
|
p = pp[r-1]; pp[r-1] = pp[r2+1-1]; pp[r2+1-1] = p;
|
|
r = r2 + 1;
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
BOOL DPA_HeapSort(SORTPARAMS* psp)
|
|
{
|
|
void** pp = psp->pp;
|
|
int c = psp->cp;
|
|
int i;
|
|
|
|
for (i = c / 2; i >= 1; i--)
|
|
DPA_HeapSortPushDown(i, c, psp);
|
|
|
|
for (i = c; i >= 2; i--)
|
|
{
|
|
void* p = pp[0]; pp[0] = pp[i-1]; pp[i-1] = p;
|
|
|
|
DPA_HeapSortPushDown(1, i - 1, psp);
|
|
}
|
|
return TRUE;
|
|
}
|
|
#endif // USEHEAPSORT
|
|
|
|
#if defined(MERGESORT)
|
|
|
|
#define SortCompare(psp, pp1, i1, pp2, i2) \
|
|
(psp->pfnCmp(pp1[i1], pp2[i2], psp->lParam))
|
|
|
|
//
|
|
// This function merges two sorted lists and makes one sorted list.
|
|
// psp->pp[iFirst, iFirst+cItes/2-1], psp->pp[iFirst+cItems/2, iFirst+cItems-1]
|
|
//
|
|
void DPA_MergeThem(SORTPARAMS* psp, int iFirst, int cItems)
|
|
{
|
|
//
|
|
// Notes:
|
|
// This function is separated from DPA_MergeSort2() to avoid comsuming
|
|
// stack variables. Never inline this.
|
|
//
|
|
int cHalf = cItems/2;
|
|
int iIn1, iIn2, iOut;
|
|
void **ppvSrc = &psp->pp[iFirst];
|
|
|
|
// Copy the first part to temp storage so we can write directly into
|
|
// the final buffer. Note that this takes at most psp->cp/2 DWORD's
|
|
CopyMemory(psp->ppT, ppvSrc, cHalf * sizeof(void*));
|
|
|
|
for (iIn1=0, iIn2=cHalf, iOut=0;;)
|
|
{
|
|
if (SortCompare(psp, psp->ppT, iIn1, ppvSrc, iIn2) <= 0) {
|
|
ppvSrc[iOut++] = psp->ppT[iIn1++];
|
|
|
|
if (iIn1==cHalf) {
|
|
// We used up the first half; the rest of the second half
|
|
// should already be in place
|
|
break;
|
|
}
|
|
} else {
|
|
ppvSrc[iOut++] = ppvSrc[iIn2++];
|
|
if (iIn2==cItems) {
|
|
// We used up the second half; copy the rest of the first half
|
|
// into place
|
|
CopyMemory(&ppvSrc[iOut], &psp->ppT[iIn1], (cItems-iOut)*sizeof(void *));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// This function sorts a give list (psp->pp[iFirst,iFirst-cItems-1]).
|
|
//
|
|
void DPA_MergeSort2(SORTPARAMS* psp, int iFirst, int cItems)
|
|
{
|
|
//
|
|
// Notes:
|
|
// This function is recursively called. Therefore, we should minimize
|
|
// the number of local variables and parameters. At this point, we
|
|
// use one local variable and three parameters.
|
|
//
|
|
int cHalf;
|
|
|
|
switch(cItems)
|
|
{
|
|
case 1:
|
|
return;
|
|
|
|
case 2:
|
|
// Swap them, if they are out of order.
|
|
if (SortCompare(psp, psp->pp, iFirst, psp->pp, iFirst+1) > 0)
|
|
{
|
|
psp->ppT[0] = psp->pp[iFirst];
|
|
psp->pp[iFirst] = psp->pp[iFirst+1];
|
|
psp->pp[iFirst+1] = psp->ppT[0];
|
|
}
|
|
break;
|
|
|
|
default:
|
|
cHalf = cItems/2;
|
|
|
|
// Sort each half
|
|
DPA_MergeSort2(psp, iFirst, cHalf);
|
|
DPA_MergeSort2(psp, iFirst+cHalf, cItems-cHalf);
|
|
// Then, merge them.
|
|
DPA_MergeThem(psp, iFirst, cItems);
|
|
break;
|
|
}
|
|
}
|
|
|
|
BOOL DPA_MergeSort(SORTPARAMS* psp)
|
|
{
|
|
if (psp->cp==0)
|
|
return TRUE;
|
|
|
|
// Note that we divide by 2 below; we want to round down
|
|
psp->ppT = LocalAlloc(LPTR, psp->cp/2 * sizeof(void *));
|
|
if (!psp->ppT)
|
|
return FALSE;
|
|
|
|
DPA_MergeSort2(psp, 0, psp->cp);
|
|
LocalFree(psp->ppT);
|
|
return TRUE;
|
|
}
|
|
#endif // MERGESORT
|
|
|
|
// Search function
|
|
//
|
|
int WINAPI DPA_Search(HDPA pdpa, void* pFind, int iStart,
|
|
PFNDPACOMPARE pfnCompare, LPARAM lParam, UINT options)
|
|
{
|
|
int cp = DPA_GetPtrCount(pdpa);
|
|
|
|
ASSERT(pfnCompare);
|
|
ASSERT(0 <= iStart);
|
|
|
|
// Only allow these wierd flags if the list is sorted
|
|
ASSERT((options & DPAS_SORTED) || !(options & (DPAS_INSERTBEFORE | DPAS_INSERTAFTER)));
|
|
|
|
if (!(options & DPAS_SORTED))
|
|
{
|
|
// Not sorted: do linear search.
|
|
int i;
|
|
|
|
for (i = iStart; i < cp; i++)
|
|
{
|
|
if (0 == pfnCompare(pFind, DPA_FastGetPtr(pdpa, i), lParam))
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
// Search the array using binary search. If several adjacent
|
|
// elements match the target element, the index of the first
|
|
// matching element is returned.
|
|
|
|
int iRet = -1; // assume no match
|
|
BOOL bFound = FALSE;
|
|
int nCmp = 0;
|
|
int iLow = 0; // Don't bother using iStart for binary search
|
|
int iMid = 0;
|
|
int iHigh = cp - 1;
|
|
|
|
// (OK for cp == 0)
|
|
while (iLow <= iHigh)
|
|
{
|
|
iMid = (iLow + iHigh) / 2;
|
|
|
|
nCmp = pfnCompare(pFind, DPA_FastGetPtr(pdpa, iMid), lParam);
|
|
|
|
if (0 > nCmp)
|
|
iHigh = iMid - 1; // First is smaller
|
|
else if (0 < nCmp)
|
|
iLow = iMid + 1; // First is larger
|
|
else
|
|
{
|
|
// Match; search back for first match
|
|
bFound = TRUE;
|
|
while (0 < iMid)
|
|
{
|
|
if (0 != pfnCompare(pFind, DPA_FastGetPtr(pdpa, iMid-1), lParam))
|
|
break;
|
|
else
|
|
iMid--;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bFound)
|
|
{
|
|
ASSERT(0 <= iMid);
|
|
iRet = iMid;
|
|
}
|
|
|
|
// Did the search fail AND
|
|
// is one of the strange search flags set?
|
|
if (!bFound && (options & (DPAS_INSERTAFTER | DPAS_INSERTBEFORE)))
|
|
{
|
|
// Yes; return the index where the target should be inserted
|
|
// if not found
|
|
if (0 < nCmp) // First is larger
|
|
iRet = iLow;
|
|
else
|
|
iRet = iMid;
|
|
// (We don't distinguish between the two flags anymore)
|
|
}
|
|
else if ( !(options & (DPAS_INSERTAFTER | DPAS_INSERTBEFORE)) )
|
|
{
|
|
// Sanity check with linear search
|
|
ASSERT(DPA_Search(pdpa, pFind, iStart, pfnCompare, lParam, options & ~DPAS_SORTED) == iRet);
|
|
}
|
|
return iRet;
|
|
}
|
|
}
|
|
|
|
//===========================================================================
|
|
//
|
|
// String ptr management routines
|
|
//
|
|
// Copy as much of *psz to *pszBuf as will fit
|
|
//
|
|
// Warning: this same code is duplicated below.
|
|
//
|
|
int WINAPI Str_GetPtr(LPCTSTR pszCurrent, LPTSTR pszBuf, int cchBuf)
|
|
{
|
|
int cchToCopy;
|
|
|
|
if (!pszCurrent)
|
|
{
|
|
ASSERT(FALSE);
|
|
|
|
if (cchBuf > 0)
|
|
{
|
|
*pszBuf = TEXT('\0');
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
cchToCopy = lstrlen(pszCurrent);
|
|
|
|
// if pszBuf is NULL, or they passed cchBuf = 0, return the needed buff size
|
|
if (!pszBuf || !cchBuf)
|
|
{
|
|
return cchToCopy + 1;
|
|
}
|
|
|
|
if (cchToCopy >= cchBuf)
|
|
{
|
|
cchToCopy = cchBuf - 1;
|
|
}
|
|
|
|
CopyMemory(pszBuf, pszCurrent, cchToCopy * sizeof(TCHAR));
|
|
pszBuf[cchToCopy] = TEXT('\0');
|
|
|
|
return cchToCopy + 1;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
//
|
|
// Str_GetPtr0 is just like Str_GetPtr except that it doesn't assert if
|
|
// pszCurrent = NULL.
|
|
//
|
|
int WINAPI Str_GetPtr0(LPCTSTR pszCurrent, LPTSTR pszBuf, int cchBuf)
|
|
{
|
|
return Str_GetPtr(pszCurrent ? pszCurrent : c_szNULL, pszBuf, cchBuf);
|
|
}
|
|
#endif
|
|
|
|
//
|
|
// If we are build Unicode, then this is the ANSI version
|
|
// of the above function.
|
|
//
|
|
|
|
int WINAPI Str_GetPtrA(LPCSTR pszCurrent, LPSTR pszBuf, int cchBuf)
|
|
{
|
|
int cchToCopy;
|
|
|
|
if (!pszCurrent)
|
|
{
|
|
ASSERT(FALSE);
|
|
|
|
if (cchBuf > 0)
|
|
{
|
|
*pszBuf = '\0';
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
cchToCopy = lstrlenA(pszCurrent);
|
|
|
|
// if pszBuf is NULL, or they passed cchBuf = 0, return the needed buff size
|
|
if (!pszBuf || !cchBuf)
|
|
{
|
|
return cchToCopy + 1;
|
|
}
|
|
|
|
if (cchToCopy >= cchBuf)
|
|
{
|
|
cchToCopy = cchBuf - 1;
|
|
}
|
|
|
|
CopyMemory(pszBuf, pszCurrent, cchToCopy * sizeof(CHAR));
|
|
pszBuf[cchToCopy] = TEXT('\0');
|
|
|
|
return cchToCopy + 1;
|
|
}
|
|
|
|
//
|
|
// This function is not exported.
|
|
//
|
|
|
|
BOOL Str_Set(LPTSTR *ppsz, LPCTSTR psz)
|
|
{
|
|
if (!psz || (psz == LPSTR_TEXTCALLBACK))
|
|
{
|
|
if (*ppsz)
|
|
{
|
|
if (*ppsz != (LPSTR_TEXTCALLBACK))
|
|
LocalFree(*ppsz);
|
|
}
|
|
*ppsz = (LPTSTR)psz;
|
|
}
|
|
else
|
|
{
|
|
LPTSTR pszNew = *ppsz;
|
|
UINT cbNew = (lstrlen(psz) + 1) * sizeof(TCHAR);
|
|
|
|
if (pszNew == LPSTR_TEXTCALLBACK)
|
|
{
|
|
pszNew = NULL;
|
|
}
|
|
|
|
pszNew = CCLocalReAlloc(pszNew, cbNew);
|
|
|
|
if (!pszNew)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
StringCbCopy(pszNew, cbNew, psz);
|
|
*ppsz = pszNew;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
// Set *ppszCurrent to a copy of pszNew, and free the previous value, if necessary
|
|
//
|
|
// WARNING: This same code is duplicated below
|
|
//
|
|
BOOL WINAPI Str_SetPtr(LPTSTR * ppszCurrent, LPCTSTR pszNew)
|
|
{
|
|
LPTSTR pszOld;
|
|
LPTSTR pszNewCopy = NULL;
|
|
|
|
if (pszNew)
|
|
{
|
|
DWORD cchNewCopy = lstrlen(pszNew)+1;
|
|
|
|
// alloc a new buffer w/ room for the null terminator
|
|
pszNewCopy = (LPTSTR) Alloc(cchNewCopy * sizeof(TCHAR));
|
|
|
|
if (!pszNewCopy)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
StringCchCopy(pszNewCopy, cchNewCopy, pszNew);
|
|
}
|
|
|
|
pszOld = InterlockedExchangePointer((void **)ppszCurrent, pszNewCopy);
|
|
|
|
if (pszOld)
|
|
{
|
|
Free(pszOld);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
//
|
|
// ANSI stub when built Unicode.
|
|
//
|
|
|
|
BOOL WINAPI Str_SetPtrA(LPSTR * ppszCurrent, LPCSTR pszNew)
|
|
{
|
|
LPSTR pszOld;
|
|
LPSTR pszNewCopy = NULL;
|
|
|
|
if (pszNew)
|
|
{
|
|
DWORD cchNewCopy = lstrlenA(pszNew)+1;
|
|
|
|
// alloc a new buffer w/ room for the null terminator
|
|
pszNewCopy = (LPSTR) Alloc(cchNewCopy * sizeof(CHAR));
|
|
|
|
if (!pszNewCopy)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
StringCchCopyA(pszNewCopy, cchNewCopy, pszNew);
|
|
}
|
|
|
|
pszOld = InterlockedExchangePointer((void **)ppszCurrent, pszNewCopy);
|
|
|
|
if (pszOld)
|
|
{
|
|
Free(pszOld);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|